title: catena-Poly[[[di-aqua-bis-(seleno-cyanato-κN)iron(II)]-μ-1,2-bis-(pyridin-4-yl)ethane-κ(2) N:N'] 1,2-bis-(pyridin-4-yl)ethane disolvate dihydrate].
abstract: The title compound, {[Fe(NCSe)2(C12H12N2)(H2O)2]·2C12H12N2·2H2O} n , was obtained by the reaction of iron(II) sulfate hepta-hydrate and potassium seleno-cyanate with 1,2-bis-(pyridin-4-yl)ethane (bpa) in water. The Fe(II) cation is coordinated by two N-bonded seleno-cyanate anions, two water mol-ecules and two 1,2-bis-(pyridin-4-yl)ethane (bpa) ligands in a slightly distorted octa-hedral geometry. In addition, two non-coordinating bpa mol-ecules and two water mol-ecules are present. The Fe(II) cation is located on a center of inversion while the coordinating bpa ligand is located on a twofold rotation axis. The Fe(II) cations are linked by the bpa ligands into chains along the b-axis direction, which are further connected into layers perpedicular to the c axis by O-H⋯N and O-H⋯O hydrogen bonds to the non-coordin-ating bpa and the water mol-ecules. The crystal studied was twinned by pseudo-merohedry (180° rotation along c*; contribution of the minor twin component 3.7%).
authors.affiliation: Institut für Anorganische Chemie, Christian-Albrechts-Universität Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany.
authors.forename: Susanne
authors.initials: S
authors.lastname: Wöhlert
authors.forename: Inke
authors.initials: I
authors.lastname: Jess
authors.forename: Christian
authors.initials: C
authors.lastname: Näther